Thanks for the input guys. What you outlined is pretty much what I had figured out after a bit of digging.
There are also line output converters out there that provide the power on signal for the amp.
I don't like the "package" all-in-one deals as they are certainly no easier to hide than an amp and take up more room. I'm trying to make it as unobtrusive and close to factory as possible. And installation is not really any less work as all the same leads and connections still have to be made. All it would save me is having to remove my back seats to get the deck exposed. (Already looked through the kiatechinfo site.)
A single GOOD 8" sub rated for free-air applications should be all I need. Anything bigger would overpower the stock system and sound too boomy. I could give a crap if the guy in the car next to me can hear my music, as long as it sounds like a concert hall INSIDE the car.
